Gravity Demonstration Toy

Quick Answer: The Gravity Demonstration Toy is a balancing figure that shows how gravity and centre of gravity decide whether an object stays upright. The listing image shows a small figure on a pointed stand, with long arms curving downward to weighted ends below the pivot, so the figure tips and swings but always returns upright.

Why the Figure Never Falls

The figure balances on a single point, which looks impossible until students notice where the weight is. The heavy ends of the arms hang well below the pivot, pulling the combined centre of gravity of the figure down beneath its point of support. When the figure is nudged, the centre of gravity is lifted slightly and gravity produces a turning effect that swings it back, which is what stable equilibrium means.

If the weights were removed, the centre of gravity would sit above the pivot and the smallest tilt would make the figure topple. The gravity demonstration toy therefore gives a quick, hands-on route into the three kinds of equilibrium: stable, unstable and neutral. It is a close relative of the familiar balancing bird and of the long pole a tightrope walker carries.

Because the figure keeps rocking before it settles, it also shows oscillation about an equilibrium position, a useful link to pendulums. Materials and size are not stated in the listing and should be confirmed when ordering.

Care & Handling

• Place the stand on a flat surface away from bench edges, since the figure rocks when touched.
• Nudge the figure gently; a hard push can knock it off the pivot point.
• Check the pivot tip for bending and the arm weights for looseness before use.
• Store the figure off its stand in a box so the arms are not bent out of shape.

Applications

• Introducing gravity, weight and balance in primary science
• Teaching stable, unstable and neutral equilibrium in middle school
• Starting a design challenge to build a balancing figure from card and coins
• Explaining tightrope poles, ship ballast and self-righting toys

Specifications

Why Choose LabEquip

Primary and middle school teachers buy this toy because it holds attention and leads straight into the reasoning behind balance. LabEquip offers it through the STEM kits range, and the Center of Gravity Demonstration Apparatus lets older students locate the balance point of a shape by measurement. Contact our team through the contact page.

Frequently Asked Questions

Why does the figure not fall off the pivot?

Its weighted arms place the centre of gravity below the point of support. Any tilt raises the centre of gravity a little, and gravity then pulls it back down, turning the figure upright again.

What would happen without the weights on the arms?

The centre of gravity would move up into the body of the figure, above the pivot. The figure would then be in unstable equilibrium, and any small tilt would make it fall.

What is the difference between stable, unstable and neutral equilibrium?

In stable equilibrium a small push is followed by a return to the starting position. In unstable equilibrium a small push leads to toppling. In neutral equilibrium, like a ball on a flat table, the object stays wherever it is moved.

Is this the same idea as the balancing bird toy?

Yes. The bird’s wings carry weights forward and downward so that its centre of gravity lies under the beak tip. The figure here uses curved, weighted arms to do the same thing.

How does a tightrope walker use this principle?

A long pole, especially one that droops at the ends, increases the walker’s moment of inertia so any tilt develops more slowly, and a drooping pole also lowers the combined centre of gravity a little. That gives the walker more time to correct balance.

What age group is the toy suitable for?

It works well from early primary, where pupils simply observe and predict, up to middle school, where they explain the result in terms of centre of gravity and turning effects. Adult supervision is sensible because of the pointed pivot.

Last Updated: September 2026